Magnetic lens and exciting current control method
US10923312B2 · kind B2 · utility
0Cited by
2References
6Claims
0Family size
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Key dates
| Filing date | Sep 5, 2017 |
| Grant date | Feb 16, 2021 |
| Priority date | — |
| Expiry date | Sep 5, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2237/152
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A magnetic lens is disclosed, which includes: a magnetic yoke, an exciting coil and a power supply controlling system. The magnetic yoke is at outside of the exciting coil and surrounds the coil; the exciting coil is made up of litz wires; the power supply controlling system is arranged to supply power to the exciting coil and control the flow directions and magnitudes of the currents in the exciting coil. A method for controlling the magnetic lens is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.